Viconics VT8300 Low Voltage Application Guide Manual do Utilizador descarregar pdf (Página 47)

Fan Coil Unit Controller SeriesApplication Guide

028-0444-01 www.viconics.com | sales@viconics.com February 2015

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VT8300

BO2 - Fan L

BO3 - Fan M

BO4 - Fan H

RC (24 Vac)

C (Common)

BO8 - Aux Heat

OU9

- Close Cool V

UO10 - Close Heat V

UO11 - Open Cool V

UO12 - Open Heat V

BACnet +

BACnet -

BACnet REF

UI 16

UI 17

Common

UI 19

UI 20 - RS

Common

UI22 - SS

Mod. & On / Off Control

ZONE DAMPER ACTUATOR

0-10 v 24 v Com.

COMM ON

24 VAC

24 Vac Transformer

PWM DUCT HEATER

SOLID STATE RELAY

10 k-2

CO SENSOR

SCOM

Sequence of Operation and Wiring

Occupied Mode

During Occupied periods, occupied heating and cooling setpoints

are used.

Stand-by Mode (only available when PIR motion detector

sensor is used)

When equipped with a PIR (Passive Infrared) accessory sensor

the Controller provides advanced active occupancy logic, which

automatically switches occupancy levels from occupied to stand-by

to unoccupied when no motion is detected in the room:

• During PIR activated stand-by periods, stand-by heating and

cooling setpoints are used.

• During PIR activated unoccupied periods, the unoccupied-by

heating and cooling setpoints are used.

Unoccupied Mode

During unoccupied periods, unoccupied heating and cooling

setpoints are used.

Local Override

The controller reverts back to Occupied mode as speciﬁed by a

conﬁguration timer when a local override is requested at Controller.

On Call for Heat

If supply water temperature is higher than 77°F (25°C), valve

modulates from closed to open according to demand. If water

supply temperature is less than 75°F (23.9°C), valve remains

closed. The duct heater operates as a second step.

On Call for Cool

If supply air temperature is less than 75°F (23.9°C), damper

modulates from closed to open according to demand. If water

supply temperature is greater than 77°F (25°C), damper remains

closed.

Options

• Wireless adapter modules for BACnet models are available.

(see Appendix B for network wiring).

• Remote wall mounted sensor or return air temperature

sensor can be used instead of internal temperature sensor of

Controller.

• 3 universal inputs can be used and conﬁgured for advanced

functionality as required by the application.

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